zig cc: complete the -wrap flag implementation

* use a set instead of a list
* use of this flag currently requires LLD
* add documentation
* make it only a zig cc compatibility flag for now because I personally
  think this is an anti-feature.

1 files changed, 7 insertions, 1 deletions

diff --git a/src/link.zig b/src/link.zig
index fb0f79f5f2..18002f64a6 100644
--- a/src/link.zig
+++ b/src/link.zig
@@ -183,12 +183,18 @@ pub const Options = struct {
     wasi_emulated_libs: []const wasi_libc.CRTFile,
     lib_dirs: []const []const u8,
     rpath_list: []const []const u8,
-    wrap_list: []const []const u8,
 
     /// List of symbols forced as undefined in the symbol table
     /// thus forcing their resolution by the linker.
     /// Corresponds to `-u <symbol>` for ELF/MachO and `/include:<symbol>` for COFF/PE.
     force_undefined_symbols: std.StringArrayHashMapUnmanaged(void),
+    /// Use a wrapper function for symbol. Any undefined reference to symbol
+    /// will be resolved to __wrap_symbol. Any undefined reference to
+    /// __real_symbol will be resolved to symbol. This can be used to provide a
+    /// wrapper for a system function. The wrapper function should be called
+    /// __wrap_symbol. If it wishes to call the system function, it should call
+    /// __real_symbol.
+    symbol_wrap_set: std.StringArrayHashMapUnmanaged(void),
 
     version: ?std.builtin.Version,
     compatibility_version: ?std.builtin.Version,